ML20237F938

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Proposed Tech Specs,Deleting Requirements to Start Diesel Generators,Synchronize & Load Them to Safety Buses in Actions a & F During Periods When Offsite Power Is in Degraded Condition
ML20237F938
Person / Time
Site: River Bend Entergy icon.png
Issue date: 08/07/1987
From:
GULF STATES UTILITIES CO.
To:
Shared Package
ML20237F921 List:
References
NUDOCS 8708130240
Download: ML20237F938 (5)
v • d • e


Text

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3/4.8 ELECTRICAL POWER SYSTEMS 3/4.8.1 A.C. SOURCES A.C. SOURCES - OPERATING LIMITING CONDITION FOR OPERATION 3.8.1.1 As a minimum, the following A.C. electrical power sources shall be OPERABLE:

a.

Two physically independent circuits between the offsite transmission network and the onsite Class 1E distribution system, and b.

Three separate and independent diesel generators, each with:

1.

A separate day fuel tank containing a minimum of 316.3 gallons qf fuel, 2.

A separate fuel storage system containing a minimum of 45,495 gallons of fuel, and 3.

A separate fuel transfer pump.

APPLICABILITY:

OPERATIONAL CONDITIONS 1, 2, and 3.

ACTION:

a.

With one offsite circuit of the above-required A.C. electrical power sources inoperable, demuastrate the OPERABILITY of the remaining A.C.

sources by performing Surveillance Requirement 4.8.1.1.1.a within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> and at least once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> thereafter.

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Restore the offsite circuit to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in at least HOT SHUT 00WN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

b.

With either diesel generator 1A or 1B inoperable, demonstrate the OPERABILI":Y of the above required A.C. offsite sources by performing Surveillance Requirement 4.8.1.1.1.a within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> and at least once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> thereafter.

If the diesel generator became inoperable

~

as a result of 3 1!"bktrdemonstratetheOPERABILITYoftheremainingOPERABLEdiesel

"- 00 ny ::a:: :th:r th:n pr:pI:nn d pr:v:ntiv: : fet:n:nt: Or t :t-valid failure, generators, separately, by performing Surveillance Requirements 4.8.1.1.2.a.4 and 4.8.1.1.2.a.5 within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> *.

Restore the inoper-able diesel generator to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

  • This test is required to be completed regardless of when the inoperable diesel generator is restored to OPERABILITY.

RIVER BEND - UNIT 1 3/4 8-1 e708130240 B70B07 PDR ADOCK 05000458 p

PDR

i ELECTRICAL POWER SYSTEMS LIMITING CONDITION FOR OPERATION (Continued) i ACTION (Continued) c.

With one offsite circuit of the above-required A.C. sources ar.d diesel I

generator 1A or 18 of the above required A.C. electrical power sources inoperable, demonstrate the OPERABILITY of the remaining A.C. sources by performing Surveillance Requirement 4.8.1.1.1.a within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> and j

at least once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> thereafter.

If a diesel generator became s

as a result of'a noperable due te 2ny aun other tM" prephr ed pnve-tive 2i"te-valid failure,

.r n er tert 4";, demonstrate the OPERABILITY of the remaining GPERA-BLE diesel generators, separately, by performing Surveillance Require-ments 4.8.1.1,2.a.A and 4.8.1.1.2.a.5 within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> *,

Restore at least one of the inoperable A.C. sources to OPERABLE status within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

Restore at least two offsite circuits and. diesel generators 1A and IB to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> from time of initial loss or be in at least HOT SHUT-DOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTDOWN within the follow-ing 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

d.

With diesel generator 1C of the above required A.C. electrical power sources inoperable, demonstrate the OPERABILITY of the offsite A.C.

sources by perforating Surveillance Requirement 4.8.1.1.1.a within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> and at least once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> thereafter.

If the diesel gener-ator became inoperable as a result.of :n; nun ethe-thea p ep'imed a valid failure, pr:v rtive si-ters ce er terting, demonstrate the OPERABILITY of the remaining OPERABLE diesel generators, separately, by performing Sur-veillance Requirements 4.8.1.1.2.a.4 and 4.8.1.1.2.a.5 within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />".

Restore diesel generator 1C to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or declare the HPCS system and the C SSW pump inoperable and take the ACTION required by Specifications 3.5.1 and 3.7.1.1.

e.

With diesel generator 1A or 18 of the above required A.C. electrical power sources inoperable, in addition to taking ACTION b or c, as applicable, verify within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> that all required systems, subsys-tems, trains, components and devices that deperjd on the remaining 1

OPERABLE diesel generator as a source of emergency power are also OPERABLE, and that the C standby service water pump is OPERABLE if diesel generator 1B is inoperable; otherwise, be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTOOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

f.

With both of the above required offsite circuits inoperable, "-- -

txt: th: " PSP ^.SILI" :f th n d'en!

rente c, rep 2 ete'y, by p:rf:r #ng Surv:i' h n: " qui-n nt: ' S.1.1.2.:.' rd '.S.1.1.2.:.5 cith'- S~ n::= =M:: th: dhn';:nntr: r: :! ndy rpe nti ;.

/estoreatleastoneoftheabove-requiredoffsitecircuitstoOPERABLE status within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> or be in at least HOT SHUTOOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

With only one offsite circuit restored to OPERABLE status, "This test is required to be completed regardless of when the inoperable diesel l

generator is. restored to OPERABILITY.

l RIVER BEND - UNIT 1 3/4 8-2 l

ELECTRICAL POWER SYSTEMS LIMITING CCNDITION FOR OPERATION (Continued)

ACTION (Continued) restore at least two offsite circuits to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> from time of initial loss or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

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g.

With diesel generators 1A and 18 of the above required A.C. electrical power sources inoperable, demonstrate the OPERABILITY of the remaining A.C. sources by performing Surveillance Requirement 4.8.1.1.1.a within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> and at least once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> thereafter and Surveillance Requirements 4.8.1.1.2.a.4 and 4.8.1.1.2.a.5 for diesel generator 1C within 8 hour9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> 4

  • Restore at least one of the inoperable diesel gener-l ators la ana 18 to OPERABLE status within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

Restore both diesel generators 1A and 18 to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> from time of initial, loss or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

h.

With one offsite circuit of the above-required A.C. electrical power sources inoperable and diesel generator 1C inoperable, apply the requirements of ACTION statements a and d specified above.

i.

With either diesel generator 1A or 18 inoperable and diesel generator 1C inoperable, apply the requirements of ACTION statements b, d and e specified above.

if either inoperable diesel generator resulted from a valid failure.

I i

I

{

  • This test is required to'be completed regardless of when the inoperable diesel generator is, restored to OPERABILITY.

i RIVER BEND - UNIT 1 3/4 8-3

- Y

3/4.8 ELECTRICAL POSER SYSTEMS BASES 3/4.8.1. 3/4.8.2 and 3/4.8.3 A.C. SOURCES, D.C. SOURCES and ONSITE POWER DISTRIBUTION SYSTEMS The OPERABILITY of the A.C. and D.C. power sources and associated

~

distribution systems during operation ensures that sufficient power will be available to supply the ::afety related equipment required for the safe shutdown of the facility and the mitigation,and control of accident condi-tions within the facility.

The minimum specified independent and redundant A.C. and D.C. power sources and distribution, systems satisfy the requirements of General Design Criterion 17 of Appendix "A" to 10 CFR Part 50.

The ACTION requirements specified for the levels of degradation of the power sources provide restriction upon continued facility operation commen-l surate with the level of degradation.

The OPERABILITY of the power sources is consistent with the initial condition assumptions of the safety analyses i

and is based upon maintaining OPERABLE at least Division I or II of the onsite l

A.C. and D.C. power sources and associated distribution systems during accident conditions coincident with an assumed loss of offsite power and single failure of the other onsite A.C. or D.C. source.

Division III supplies the high pressure core spray (HPCS) system and the standby service water pump ISWP*P2C with its auxiliaries.

The A.C. and D.C. source allowable out-of-service times are based on Regulatory Guide 1.93, " Availability of Electrical Power Sources," December 4

1974, as modified by plant-specific analysis and diesel generator manufacturer's recommendations.

When diesel. generator iA or IB is inoperable, there is an additional ACTION requirement to ' verify that all required systems, subsystems, trains, components and devices, that depend on the remaining OPERABLE diesel generator 1A or 18 as a source of emergency power, are also OPERABLE.

This requirement is intended to provide assurance that a loss of offsite power, during the period that diesel generator 1A or 1B is inoperable, will not result in a complete loss of safety function of critical systems.

The term verify, as used in this context, means to administratively check, by examining logs or other information, to determine if certain components are out of service for mainte-nance or other reasons.

It does not mean to perform the surveillance require-ments needed to demonstrate the OPERABILITY of the component.

The OPERABILITY of the minimum specified A.C. and D.C. power sources and associated distribution systems, during shutdown and refueling, ensures that the facility can be maintained in the shutdown or refueling ccndition for extended time periods and sufficient instrumentation and control capability is available for monitoring and maintaining the unit status.

The surveillance requirements, for demonstrating the OPERABILITY of the diesel generators, are in accordance with the recommendations of Regulatory Guide 1.9, " Selection of Diesel Generator Set Capacity for Standby Power Supplies," March 10, 1971, and Regulatory Guide 1.108, " Periodic Testing of Diesel Generator Units Used as Onsite Electric Power Systems at Nuclear Power Plants," Revision 1 August 1977, as modified by plant-specific analysis and diesel generator manufacturer's recommendations.

Insert "A"

RIVER BEND - UNIT 1 8 3/4 8-1

V Insert "A"

A valid failure shall be defined as:

'Any failure of a diesel generator, that has not been previously declared inoperable, which prevents or would have prevented the diesel generator from performing its safety related function.

Excluded from this definition are. failures attributed to:

personnel error; malfunction of equipment not required to be operable in the eraergency mode; spurious operation of a trip that is bypassed in the emergency mode; diesel generator inop-1 erablity caused by preplanned preventive maintenance or testing; and other items as described in US NRC Regulatory Guide 1.108,

" Periodic Testing of Diesel Generator Units Used as Onsite Elec-tric Power Systems at Nuclear Power Plants", Revision 1,

August, 1977.

i l

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